[Webkit-unassigned] [Bug 199929] New: [JSC] Stop performing precise structure transition tracking if # of nodes in basic block is too large
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Jul 18 20:17:26 PDT 2019
https://bugs.webkit.org/show_bug.cgi?id=199929
Bug ID: 199929
Summary: [JSC] Stop performing precise structure transition
tracking if # of nodes in basic block is too large
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: ysuzuki at apple.com
Precise structure transition tracking takes quadratic complexity for N, where N nodes are in a basic block.
We should give up for ridiculously large basic block.
I would like to adjust the threshold for DFG optimization too, but it would be good in a separate patch, idk.
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